NDLI: Thermodynamic study and methanothermal temperature-programmed reaction synthesis of molybdenum carbide

Content Provider	Springer Nature Link
Author	Roohi, Parham Alizadeh, Reza Fatehifar, Esmaeil
Copyright Year	2016
Abstract	Nanostructured molybdenum carbide (Mo$_{2}$C) was successfully prepared from molybdenum trioxide (MoO$_{3}$) using methanothermal temperature-programmed reaction. Thermodynamic analysis indicated that in presence of methane, the formation of Mo$_{2}$C from MoO$_{3}$ occurs through the path of MoO$_{3}$ → MoO$_{2}$ → Mo$_{2}$C. The carburized MoO$_{3}$ was characterized using X-ray diffraction (XRD), CHNS/O analysis, Brunauer–Emmett–Teller (BET) analysis, and field-emission scanning electron microscopy (FESEM). At final carburization temperatures of 700 and 800°C and at methane contents ranging from 5vol% to 20vol%, Mo$_{2}$C was the only solid product observed in the XRD patterns. The results indicated that the effect of methane content on the formation of the carbide phase is substantial compared with the effect of carburization time. Elemental analysis showed that at a final temperature of 700°C, the carbon content of carburized MoO$_{3}$ is very close to the theoretical carbon mass percentage in Mo$_{2}$C. At higher carburization temperatures, excess carbon was deposited onto the surface of Mo$_{2}$C. High-surface-area Mo$_{2}$C was obtained at extremely low heating rates; this high-surface-area material is a potential electrocatalyst.
Starting Page	339
Ending Page	347
Page Count	9
File Format	PDF
ISSN	16744799
Journal	International Journal of Minerals, Metallurgy, and Materials
Volume Number	23
Issue Number	3
e-ISSN	1869103X
Language	English
Publisher	University of Science and Technology Beijing
Publisher Date	2016-02-27
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	molybdenum carbide thermodynamic analysis temperature programmed reaction methane Materials Science Metallic Materials Characterization and Evaluation of Materials Ceramics, Glass, Composites, Natural Methods Surfaces and Interfaces, Thin Films Tribology, Corrosion and Coatings
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Mechanics of Materials Metals and Alloys Geochemistry and Petrology Mechanical Engineering

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